Factitious Hypoglycemia Syndrome: Causes, Symptoms, and Management

Overview

Factitious hypoglycemia syndrome is a rare, serious factitious disorder where a person intentionally causes dangerously low blood sugar (hypoglycemia) without a medical need for blood sugar-lowering medications. Most often, this behavior is driven by an unconscious need to assume the 'sick role'—seeking attention, sympathy, or care from healthcare providers, loved ones, or others. The condition is life-threatening if severe hypoglycemia is not treated promptly, and requires coordinated care from both endocrinology and mental health specialists.

Signs & Symptoms

Symptoms of factitious hypoglycemia are identical to those of hypoglycemia caused by other medical conditions, and range from mild to life-threatening. Mild symptoms include shakiness, sweating, rapid heartbeat, intense hunger, anxiety, and irritability. Moderate to severe symptoms include confusion, dizziness, blurred vision, difficulty speaking, weakness, seizures, loss of consciousness, and in extreme cases, coma or death if not treated quickly.

Causes & Risk Factors

The exact cause of factitious hypoglycemia syndrome is not fully known, but it is strongly linked to underlying psychological factors. Common risk factors include a history of childhood trauma, neglect, or abuse; a persistent, unmet need for attention or care; prior experience working in healthcare (which provides access to insulin and other diabetes medications); and a history of other factitious disorders or Munchausen syndrome.

• Injecting insulin without a prescription or medical indication
• Taking oral diabetes medications (such as sulfonylureas) without a diagnosis of diabetes
• Fasting excessively or skipping meals while taking blood sugar-lowering medications to intentionally trigger low blood sugar

Diagnosis

Diagnosing factitious hypoglycemia often takes time, as people with the condition may hide their behavior or lie about medication use. Providers first rule out other causes of hypoglycemia, such as insulinoma (a rare tumor that produces excess insulin) or other endocrine disorders. The most telling diagnostic clue is a pattern of low blood sugar with high insulin levels and low C-peptide levels during an episode: C-peptide is a substance produced when the body makes its own insulin, so low levels confirm that the insulin in the body came from an external (injected) source.

Treatment & Management

Effective treatment requires a dual approach: immediate medical care to prevent life-threatening hypoglycemia, and long-term psychiatric care to address the psychological roots of the behavior. During acute episodes, patients may need intravenous glucose to raise blood sugar levels, and in severe cases, hospital monitoring. Long-term care includes regular follow-up with an endocrinologist to monitor blood sugar, and psychotherapy (most often cognitive behavioral therapy, or CBT) to address underlying trauma, attention-seeking behaviors, and other mental health conditions like depression or anxiety. In some cases, psychiatric medication may be prescribed to support mental health treatment.

Living With It

Long-term recovery from factitious hypoglycemia syndrome is possible with consistent, coordinated care. It is important to be honest with your healthcare team about any medication use or behavior that triggers low blood sugar, as this allows them to provide the most effective treatment. Stigma around factitious disorders can make it hard to seek help, but this condition is a treatable mental health issue, not a personal failure. Building a support system of trusted loved ones can also help reduce the urge to engage in harmful behavior to seek attention.